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Diffstat (limited to 'src/doc/rustc-dev-guide/src/diagnostics.md')
| -rw-r--r-- | src/doc/rustc-dev-guide/src/diagnostics.md | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/doc/rustc-dev-guide/src/diagnostics.md b/src/doc/rustc-dev-guide/src/diagnostics.md index e1d5fbe1a..b50b7bd18 100644 --- a/src/doc/rustc-dev-guide/src/diagnostics.md +++ b/src/doc/rustc-dev-guide/src/diagnostics.md @@ -269,7 +269,7 @@ book][rustc-lint-levels] and the [reference][reference-diagnostics]. ### Finding the source of errors -There are two main ways to find where a given error is emitted: +There are three main ways to find where a given error is emitted: - `grep` for either a sub-part of the error message/label or error code. This usually works well and is straightforward, but there are some cases where @@ -287,6 +287,8 @@ There are two main ways to find where a given error is emitted: - The _construction_ of the error is far away from where it is _emitted_, a problem similar to the one we faced with the `grep` approach. In some cases, we buffer multiple errors in order to emit them in order. +- Invoking `rustc` with `-Z track-diagnostics` will print error creation + locations alongside the error. The regular development practices apply: judicious use of `debug!()` statements and use of a debugger to trigger break points in order to figure out in what |